noun
dredging operations; dredging work
Technical term for the work of removing sediment and debris from the bottom of bodies of water, typically to maintain or deepen navigation channels.
港の浚渫作業は来月から始まる予定です。
Dredging operations at the port are scheduled to begin next month.
浚渫作業によって川の水深が確保された。
The river's depth was secured through dredging work.
Compound of 浚渫 (dredging) and 作業 (work, operations). The exact historical derivation is uncertain, but the kanji are conventionally associated with dredging and work respectively.